Metal-finishing machine.



PATENTED JUNE 23', 1908.

I). W. MULLIN. METAL FINISHING MACHINE. APPLICATION IILED no a 1906 4sums-sum 2.

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Nb. 891,281. PATENTED JUNE 23, 1908.

' D, W. MU'LLIN.

METAL FINISHING MACHINE.

APPLICATION FILED DEC. 3, 1906.

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DANIEL W. MULLIN, QFLOWELL, MASSACHUSETTS.

METAL-FINISHING MACHINE.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed December 3, 1906. Serial N 0. 346,167.

To all whom it may concern:

Be it known that I, DANIEL W. MULLIN, a citizen of the United States,residing at Lowell, in the county ofMiddlesexand State of Massachusetts,have invented certain new and useful Improvements in Metal-FinishingMachines, of which the following is a specification.

My invention relates to machines for polishing, smoothing, hardening,and stretching to size such large cylinders of copper or other similarductile material as are used for drying machines and for other similarpurposes. The cylinders in question are usually made so thin that theywill not support their own weight when placed on their sides and, at thesame time, their circumference must be smooth and of a uniform diameterand must correspond to a small fraction of an inch with the insidecircumference or the outside circumference of the rings which hold thecylinders in shape when in use. It is also necessary in drying machinesfor cloth, warps, etc., that the drying cylinder drums should be highlyburnished. These cylinders vary in diameter from three or four feet upto ten feet. The difficulty in handling such cylinders lies in the factthat they are so large and flexible that no pressure can be applied tothe outside surface Without a corresponding pressure on the insidesurface. My device is adapted for burnishing the outer surface and, atthe same time, and by the same process the cylinder is hardened and isstretc ed to any extent desired within reasonable limits.

My invention is disclosed in the accompanying drawings, in which Figure1 is a side view of the complete device with a cylinder in placethereon. Fig. 2 is a side view of a portion of the guide rail andburnishing carriage. Fig. 3 is an enlarged view of the end of thependulum showing the hanger for the pivoted arm.

Fig. 4 is an end view of the lower part of the device leaving out thependulum and face plate. Fig. 5 is a top view of the supporting Fig. 6is an elevation of one of the supporting horses. Fig. 7 is a top view ofone of the bar straps. Fig. 8 is an end view of the burnishing roll withthe hanger in section. Fig. 9 is an enlarged sectional side view of theburnishing roll and hanger on the line X, Y, of Fig. 8. Figs. 10 and 11are details of the feed rollers. Fig. 12 is a detail of the face plate.Figs. 13 and 14 are details of the dash-pots Which check the carriage.Fig. 13 shows a section on line 110111 of Fig. 14. Fig. 15 is a detailin section of the main supporting-post. I

The princi le of my device is to sup ort the cylinder by means of a barupon w 'ch the cylinder rests along a line parallel with its axis and to9. ply a burnishing roll along the outside of tffe cylinder along thecorresponding line to that at which it rests upon t e bar. This bar lineis straight and the burnishing roll is made to travel back and forthupon it. The line of contact is shifted at the end of each stroke byslowly rotating the cylinder. This process burnishes and stretches andalso hardens the metal of the cylinder.

In a general way, m device operates as follows: The cylinder to beburnished is supported by a bar A which is, in turn, su ported at oneend by a post B and at t e other end by props D D. The burnishing isdone by a burnishing roll M which supports a weighted carriage F. Thisweighted carriage F runs along guide rails E E which are above andarallel with the bar A. The

weight of tie carriage F' comes upon the burnishing roll M and thecarriage F is operated by a pivoted arm G. Arm G is pivotally connectedwith the pendulum H swung from a suitable beamor from the ceilin andmotion is given the pendulum by a revo ving face plate K through themedium of a connecting rod L. By means, of suitable feed rollers andratchets, cylinder 0 is rotated by hand so as to bring adilferent linein contact with the burnishing roll at every swing or after severalswings of the pendulum.

The bar A consists, substantially, of a T beam with the upper surface,curved, as

shown in Fig. 4, to correspond in a general way with the curve of thecylinders to be operated upon. Bar A is stiffened and supported by abracket arm 20 and is provided with an end plate 21 which connects theend of the barAwith the end of arm 20. Through this end late .21 passthe bolts 22 which also pass t rough suitable slots in the post B andare provided with nuts 23 on the outside of the ost. A set screw24'permits this end of the ar A to be raised or lowered to any extentdesired by loosening nuts 23. When at the desired heights nuts 23 aretightened, thus holdin the bar A in lace. The other end of bar is'supportedgy props D which .fit under the wings of bar A, as shown inFig.

4, and their other ends rest uponthe floor. On the floor are fixedblocks 28, and by means of removable blocks 29, which may be ofdifferent sizes, this end of bar A may be raised or lowered and held inplace. It is seldom necessary to change the height of either end of thebar A, but itis sometimes desirable to level bar A or to raise orloweritpreferably rubber covered, which may be set vided with suitablehandles.

- in brackets 42, and bolts 43.

in any desired position along shaft 36 by means of set screws 38. Shaft36 may be rotated either way by oppositely acting ratchets 39 and 40.These ratchets are pro- Bar A also carries brackets 42 which may beadjusted at different points along bar A to accommodate cylinders ofdifferent lengths by means of a series of holes in bar A coinciding withholes The upper end of each bracket 42 is formed with an oblong opening45 in which fits a squared shaft 46 which carries a friction roller 47.This squared shaft 46 may be raised or may be forced downward by bolt 48and is held in place by washer and nut 49 and by the shoulder 50. When anew cylinder is to be placed on bar A, or when an old cylinder is to beremoved, the roller 47 and shaft 46 at each end are removed entirelyafter unscrewing nuts 49 to allow the new cylinder to drop into place,or the old cylinder to be removed.

The carriage F is provided with double flanged guide wheels 52, 52 anddouble flanged supporting guide wheels 53, 53 which fit over the guiderails E E. The carriage F is so adjusted that supporting guide wheels 53rest upon the rails E, E and sustain part of the weight of the carriagewhile guide wheels 52, 52 merely guide but do not support it. Most ofthe weight is sustained, however, by the burnishing roll M. I alsoprovide additional guide wheels or rollers 54 underneath the rails andbelow guide wheels 53, 53, to prevent that end of the carriage fromtipping up. This carriage F may be weighted to any extent desired. Ateach end is fixed a fender 65.

The burnishing roll M, which may be convex, more or less, or flat, iscarried by the shaft 56, and is adapted to slide up and down in suitableslots in hanger 58. A strap 59 prevents shaft 56 from falling out andshoes 60 together with adjusting bolts 61 allow the burnishing roll tobe raised or lowered or to be leveled or canted one way or the other. Iprefer to attach a brush 62 to carriage F in contact with roll M for thepur ose'of keeping the surface of burnishing rol M clean.

Attached between rails E E in such a position as to be struck by fenders65, 65 near the end of each stroke, are the dash-pots N N, shown inFigs. 13 and 14. These dash-pots comprise a cylinder portion in whichworks a piston 66 which is held normally in the position shown, byspring 67. The cylinders either have no outlet behind the piston head orhave a very small outlet 68. These dashpots N N are formed with wings 70in which are slots of a size to fit over guide rails E, E. Dash-pots N Nmay thus be slid along rails E E for adjustment to any length of strokeand they may be clamped in place thereon by set screws 71. Thesedash-pots provide a pneumatic cushion at each end of the stroke of thependulum and help to stop the powerful momentum of the heavily weightedcarriage F.

The arm G is pivoted to the carriage F at i 73 and at its other endpasses through an opening in the pivoted hanger 74 which is carried bythe bottom of the pendulum straps P. This pivoted hanger is free toswing except as controlled by arm G.

The elbows 69 permit carriage F to be properly alined, with reference torails E, E and pendulum H. A set screw 75 holds arm G in place. Setscrew 75 may be unloosened when it is desired to push back carriage F tothe position shown by the dotted lines in Fig. 1, as is desirable when anew cylinder is being put on or when an old cylinder is being removed.The position of the path of carriage A with reference to bar A may beregulated by pushing arm G through hanger 74 whichever way desired andby then looking it in place by tightening set screw 75.

The hanger 74 is pivoted between the ends of pendulum straps P whichpass down on each side of pendulum H and are pivoted at 77 near the endthereof. These straps P extend beyond the end of the pendulum H toaccommodate the hanger 74. The two straps P are connected by studs orbolts 78, 78 which pass through curved openings 7 9, 79 in pendulum H,whereby the movement of straps P on pivot 77 is limited.

At the upper end of each strap P is bolted an arm 81 in such a mannerthat said arms may be shifted in position by means of bolts 82 and holes83. The two arms 81 are cona pin 87 and. the pin carries a nut 88 at itsot er end. A sleeve 89 with doubleflanges is carried by pin 87 betweennut 88 and track 86. This sleeve 89serves as a pivot for con:-

necting rod-'L. By loosening nut 88, pin 87' and sleeve 89 may be movedalong to any point along track 86 where itmay be fastened in place bytightening bolt 88. In this manner, the length of the throw of.connecting rod L and consequently the length of theof the path byshifting arms 81 and collar 89.,

As the carriage F is heavily Weighted: and acquires great momentum, itisdesirable not only to use the dash-pots N N but toprovide the straps Pwhich, by reason of the ins 78 and curved openings 79, allow a consierable give at the end and-beginning. of each stroke whereby a largeamount ofracking. andwear and tear is avoided. This loose motion of thependulum H and its flexibility also decrease the impact of carriage Fagainst dashpots N and prevent the pendulum from being shattered.

On most classes of cylinders, it is desirable that the burnishing roll Mshould run right up to the edge and, preferably,.that itv should passbeyond the edge of. the cylinder.. It is evident that to prevent theburnishing roll M and carriage F from dropping a distance equal to thethickness of the material of the cylinder, there must be something toreceive the roll when it leaves the cylinder. For this urpose I use abar strap 91, see Fig. 7, which is of the thickness of cylinder 0 and isprovided with wings adapted to fit over the edges of bar A to hold thestrap in place. I use one of these at each end of cylinder C.

To prevent cylinder 0 from sagging or collapsing, I support it at thebottom by means of a rack R. The ends of rack R are formed of parallelstrips of metal 93, 93 attached over grooves therein to the tops ofhorses S. Between strips 93, 93, bearings 94 for shafts 95 are adaptedto slide and to be held in any position by suitable bolts. Along shafts95.

are rubber covered pulleys 96, 96, 96, 96 capable of being fixed in anyposition by means of set screws. The rack can thus be adjusted for anysized cylinder, by moving bearings 94 or pulleys 96, or both. This rackR is supported on horses S capable of vertical adjustment by means ofthe extension legs 99, 99 which are slotted and may be held in anyposition by tightening nuts 100.

It is sometimes necessary on very large cylinders to provide supports inaddition to rack R to prevent sagging and to revent sharp bends in thecylinder. For t is ur pose, I use the ropes T which pass aroun thecylinder and up and through pulleys'101.

Ordinary knots 102 permit these'ropes to be adjusted to differentsizes-of. cylinders. By

the-use of thependulum H with straps P, I get a flexible motion which isvery'desirable withsuch heavy machinery, as it aids the fenders N, Ngreatly in taking up the shock and in reversing the movements ofcarriage F at theend of each stroke. The use ofthe pendulum H alsopermits a smaller faceplate .to be used as stated and permits rapidchangesin the adjustment. In rolling such cylinders to a. certain size,it frequently happens, through unevenness in the stock, that one end,or the middle of thecylinder is toov small. When this happens, I canreadily adjust the path. of the burnishing roll to cover that portiononly and can thus obtain accurate results.

What I claim as my invention. and: desire to cover by Letters Patentis 1. In a cylinder burnishing machine, a, supporting'banguide railsparallel thereto, a.

weighted carriage comprising guide wheels adapted to traverse'th'eguiderailsand a depending hanger in which are vertical slots,

shoes adapted toslide inthe'slots, adjusting bolts screwed into thehanger and bearing against the-shoes, ashaft carried in the slots of thehanger, and seated insaid shoes, and a burnishing roll carried by:theshaft, as described. 1

2. In acylinder burnishing machine, abar forming an interiorlongitudinal support for the cylinder, a burnishing roll, a weightedcarriage supported thereby, guide rails above and parallel with the baralong which the .oarriage travels, fenders carried by the carplate atone end, a supporting post provided with vertical slots, ts passedthrough the end plate and the slots, nuts carried by the bolts, a setscrew adapted to raise or lower this end of the bar, combined withremovable adjustable props at the other end of the bar.

4. The process of burnishing and stretchin cylinders consistin ofsupporting the cy inder internally para lel with its axis and causing aroll under pressure to travel back and forth upon the outside of thecylinder along the internal support and of rotating the cylinderintermittently so as to bring each portion of the surface successivelyunder the roll.

5. In a cylinder burnishing machine, a bar adapted to enter thecylinder, a burnishing roll supported thereby, a weighted carriagesupported by the roll, guides for the carriage parallel with the bar, aface plate, a pendulum, straps pivoted near their ends to a point nearthe free end ofthe pendulum, means for limiting the movement of thestraps, a connecting rod pivoted to the face plate and to the long endsof the straps, and a rod pivoted to the weighted carriage and to thestraps, as described.

6. In a cylinder burnishing machine, a bar adapted to enter thecylinder, a burnishing roll supported thereby, a weighted carriagesupported by the roll, guides for the carriage parallel with the bar,fenders carried by the carriage, dash pots' attached to the guides andadapted to be struck by the fenders, a pendulum pivotally connected tothe Weighted carriage, and means for actuating the pendulum asdescribed.

7. In a cylinder burnishing machine, a bar adapted to enter thecylinder, a burnishing roll supported thereby, a weighted carriagesupported by the roll, guides for the carriage parallel with the bar, aface plate, a pendulum, straps pivoted near their ends to a point nearthe free end of the pendulum, means for limiting the movement of thestraps, a connecting rod pivoted to the face plate and to the long endsof the straps, and a rod pivoted to the weighted carriage and to thestraps, combined with fenders carried by the car riage, and dash potsattached to the guides and adapted to be struck by the fenders, asdescribed.

8. The process of burnishing and stretching cylinders which consists insupporting the cylinder internally parallel with the axis and thensuccessively subjecting outer portions of the cylinder which areinternally supported to the action of a burnishing tool under pressuretraveling parallel with the axis of the cylinder.

9. In a cylinder burnishing machine, a bar adapted to enter thecylinder, a burnishing roll supported thereby, a weighted carriagesupported by the roll, guides for the carriage parallel with the bar,means for actuating the carriage comprising a loose motion, and elasticbuffers near each end of the path of the carriage.

10. In a cylinder burnishing machine, a bar adapted to enter thecylinder, a burnishing roll supported thereby, a weighted carriagesupported by the roll, guides for the carriage parallel with the bar,dash pots arranged near each end of the path of the carriage, a pendulumpivotally connected to the weighted carriage, and means for actuatingthe pendulum as described.

In testimony whereof I afliX my signature in presence of two witnesses.

. DANIEL W. MULLIN.

Witnesses:

FLORENCE A. PARR, FISHER H. PEARSON.

